Shorten the distance between metrics headings and counts

[thatbudakguy]

requested by @amyehodge via slack. since we're only showing the one metric right now (and eventually only two), having the big padding in between the heading and count looks a little weird.

before:

after:

[justinlittman]

Should this using the forthcoming table layout? It seems odd to be trying to layout a dl to look like a row.

[justinlittman]

I think you'll find the need for this is obviated with the new design.

[amyehodge]

@justinlittman Agreed.